Regenerated test certs with 1024 keys

Required due to changes in new Java security policies.

Steps to generate new certificates:
openssl req -x509 -nodes -days 365 -newkey rsa:1024 -keyout ca.key -out ca.crt

openssl genrsa -out certchain.key 1024
openssl req -new -key certchain.key -out certchain.csr
openssl x509 -req -days 365 -in certchain.csr -CA ca.crt -CAkey ca.key -set_serial 01 -out certchain.crt

openssl req -new -newkey rsa:1024 -nodes -out selfsigned.csr -keyout selfsigned.key
openssl x509 -trustout -signkey selfsigned.key -days 365 -req -in selfsigned.csr -out selfsigned.crt

NOTES:
When generating the ca.crt and certchain.crt be sure to use the same cert path
as defined in the test. Use openssh to view the contents of the cert
to see the different DNs.
Merge pull request #428 from candlepin/mstead/test-cert-update

Regenerated test certs with 1024 keys